Check valve assembly



Allg- 5 1952 c. F. WARREN 2,606,032

- CHECK VALVE ASSEMBLY original Filed March 1s, 1944 Patented Aug. 5, 1952 f andan CHECK VALVE Asser/intr I Charles F. Warren, Milwaukee, Wis.; Kathleen Warren, executrix of said Charles F. 'Warren, deceased, assigner to Charles F. Warren, Jr.

Original application March 13, 1944, Serial No. f f f I 526,188, now Patent No. 2,424,595, dated July I 29, 1947. Divided and this application June 6, v

1947, Serial No. 753,073 v eciaims. (simi- 61) t This invention relates to improvements in a check valve assembly. The present application is a division of my application 526,188, entitled.

of the two coaxially arranged valves, it is my purpose to provide webs subdividing the ports and providing full mechanic support for the valve members against collapse of such members under back pressure.

It is a further object of the invention to prol vide a check valve in which the valve member comprises an annulus of elastically flexible material of tapering thickness with a reenforced marginal periphery radially disposed and clamped 'm xed position and a thinner inner periphery constituting the movable valve element.

It is also my purpose to provide a construction in which back pressure not only urges but wedges each valve member toward its respective ancillary seat, from which the valve is readily yieldable with little resistance when flow is in the right direction.

Other objects and advantages of the invention will appear from the following disclosure,'refer ence being made to the drawings in which:

Fig. l is a view in axial cross section through a double check valve embodying my invention.

Fig. 2 is a View in transverse section on the line 2--2 of Fig. l through the bolts holding the valve casing element together, one of the casing `elements being shown in front elevation.

Fig. 3 is a view partially lin side elevation and partially in axial section through the casing element shown in Fig. 2.

Fig. 4 is a developed view in cross section through some of the valve inlet ports 35.

Fig. 5 is a view in cross section through some of the valve outlet ports.

By way -of exempliication only, the valvek 'the' ring into casing l.

Y n 2 the'objectives of thepresent invention. HOW- ever, for many other purposes, either valvey may be used individually. x

The casing member l, into which liquid'is drawn from the inlet pipe 60, and' from which it is expelled through the outlet pipe 4, has 'connected to its outer end the ring Zand rthe closure or cap plate 3. Countersunk cap screws 6I eX- tend through the coverplate 3 and through'the ring 2 into threaded openings in the end wall-of the pump chamber l' to hold these partsiin as'-` sembled relation. .The ring 2 has an annular. end

wall from which sleeve 'l2 projects axially through Within the sleeve is core 78. The annular port between the ring. 2 land the sleeve 12 is spanned by partition webs 15, while the similar port between the sleeveV and core is spanned by webs 19, whereby the ring and sleeve and core are unitarily connected. v.

The end wall 62 of the chamber I andthe opposing end wall 63 of the ring 2 function jas clamping jaws to secure an annular valve member of rubber or similar resilient material shown at 64. The thicker mounting portion 65 of this valve member is gripped between the faces 62 and 53,vand the extreme marginal portion 66 is made slightly wider than the remainder of the body and is accommodated in annular grooves 61 and 68l formed in these facesfSZ and 63 respectively. The free inner annular portion '69 of the valve member 64 is of tapering cross section -and'generally cylindrical form and is formed so asr to extend substantially at right angles (as viewed in cross section) to the mounting portion 65. The inner margin of the valve member thus encompasses and seats against the annular valve seat 19, which, as seen in Fig. l, is supported in -a groove 1l formed in thesleeve l12.". This sleeve extends rearwardly (to the left in Fig. ll'ffr'oi'n the transverse end wall of the ring 2, an'dis spaced within the chamber so as to provide'an annular passage 13 across which the valve Bllvextends when it contacts with'the seat 195 This passage 13 connects with a series of passages 14 between the aforesaidpartition webs 15, against on the inner face of the valve member 84, which is seated at 10, causes the thin free edge of the valve to be expanded and unseated, and the liquid in the pipe 60 passes the valve into the casing I.

Within .the inner cylindrical portion 12 of .the ring 2, the core 18 is supported by integral webs 19 spaced at intervals circumferentially of the core 18 and subdividing the annular` port into annular series of passages 80 between the webs. These passages are closed normally by an annular valve member 8| of rubbervlor .like resilient material, having an anchorage, portion 82 which is clamped between a shoulder Il3at` the outer end of the sleeve 12 and @the end off a.tube'84 which is integral with the cover plate 3 and which telescopes within the outer end wall of the ring 2. A thickened and generally radial mounting portion 85 of the valve member is accommodated in grooves adjacent these clamping faces, as seen -inGFig 1,;:to ensure' anchorage and-v lretention of 'the` valve" in'nthis lposition, and; .the` 4inner icxible annular portion of the valve-,member Yis tapered -to a' free edge aofi, minimum' lthickness zand; cylin- -IdricalA 'internal contour, said; edgeibeing disposed at `right. angles ato. .the V4anchored bodyv portion 82 :(as-fviewed in crosssectiomso asA toengage an Vannular seata88 lodgedinagroove. 81 inthe core amemberffl. Around-...this end'of the core, and Vimmediately.:aroundthel thinner portion Aof the -valvemember 8 I,.an.an'nular passage 88 is formed .between .the core'18.and arbore inthe cover plate 'iandthis-.passage tapers, to a central outlet 89 :which is ithreadedfor connection with -.the outlet Apipe-4.

='Ilhe'portions vof the valvef-membersfIir and; 8| whichare compressively grippedy between shoulders-off'thefstructure forfanchoringthem in-` position'a-are.l preferably reinforced by "intermolded -fringsfof fabric; .indicated l at? 90,. sof asv to someawh'atnlimit compressibility` .orfthesef-portions of the.l valve .membersfand permit themto i bev :firmly ficlamped in Yiplacezwhen the. parts,i I 2 y and- 3 v are l:assembled 4and secured by fthe clamping .To Iacilitate the-now ofgithe liquid through the ichannels '14 a.and.8Il,i the-j ends of :the linterven- Iing 'r'.ibsf- 15 '-.and 18 1 are preferably tapered or .'streamlined, as indicated :in Figs.14 andr5. Thus,

..thel tapered end. portions 19a? confrontgthe 1 iiow -of'-liquid as it :enters passages 80 .between the 'ribs218zandzzthe tapered-end15a1ofitheribs 15 idinectthet ,lowjnto .Ethel :intervening passages 1 4.

'.fll'he lva;lve'-.'64 unseatsf readily tovpei-:mit flow -rrcmr-.pipeli into.. chamber I ,i but seats positively :andawith agwedgingactionin response to pres- .'Suresdnfchamber I inexcess of those in the rmanifold 18. ."I'hefswedging-'action' is, o-f cou-rse, attributablev to theY relatively large area of :the .iexible :valvev member -V ISLy which isi-exposed to ;pressur es-.wi-thin chamber I, fand to` the curve Nwitlrgwhich the valve member is formed Vbetween fitsianchorage portion andv itsfree; iiexiblefedge. Theconcave shoulders 1500i the supportingwebs gorjvpar-.titions I support .the valvenaturallyin the ecurvatonwhich it is formed.-

The foutletf check -valve8 I operates .similarly in ,the ppposite :direction to` -open with facility .Iorythe escape of iiuid from chamber I to, pipe Lehut vtoaclose lwhenever the pressure in cham- .berrl fisless than that in the manifold 88. TheV .-shoulders1190fof webs 91 have a diierentcurvafturefirom .that Lof lthe shoulder 150..of web 15 butgtheyprovidesimilar support for the out- 4-let-l valve 8I'to enable it;to. seat securely with :respective seats by their own elasticity and require no springs. Nor are their any moving metallic parts. Pressure differential is primarily reliedupon for the-assurance of a perfect seat and, consequently, a very light pressure diilerential fin rthe appropriate direction will open one valve or the other.

I claim: 14A valvercornprising an outer shell having laxially .separable parts provided with clamping shoulders, an inner core spaced from the shell toprovide an annular port between the core and the shell, said core having a seat at one end of said portandaxially offset from the shoulders of said shell, a pluralityof integral webs connecting the corefwith oneofthe parts ofthe' shell and.v having curvilinear shoulders extending; `from the last mentioned shell part substantially fully to the seat of the core, and an -annular -valve having ra relatively heavy .mounting portion engaged between the shoul- .dersof thezshell parts and extending thence curvilinearly to a generallycylindrical portion engaging the core at the seat, said valve having :intermedia-te portions substantiallyfully supported upon the shoulders of `said webs, together with clamping -means connecting said shell parts linclamping engagement with themounting porftion ofA -said valve.

2. A compound check valve structure comprisingin. combination anzouter shell, an intermediate-.sleeve spaced within; the outer shell and provided with avalve, seat, aV core spaced `withinpthesleeveand provided with a valve seat, partition webszsubdividing the annular space between theshell andthe sleeve to provide a multiple port, Vpartitionr Webs. spanning the space betweenthersleeve and the, core and providing `agmultiple. port,'all of said webs being provided Vwith` valve Vsupporting shoulders extending to, and runningoutat, the respective seats.v a flexvible; annular valve member projecting inwardly from said shell in conformity with the shoulders of the partition webs rst mentioned and extending-.axially toward the seat of said shell, said valve :having aA freeV margin adjacent said seat,..a second valve member projecting inwardly fromgsaid sleeve and extending in contact with the ,partition webs second mentioned `axially of said core Aand provided with a free margin adjacent the seat portion of said core, an end closure means providing a manifold communicating with'the port controlled by the rst valve. and-a discharge pipe communicating with the space within said sleeve whereby to receive e1'- Ailuent controlled by the second valve.

3. In a:device .of the character described, the combination of .a casing member having a terv minal shoulder, a ring member having a termiprovided within the ring member with a second valve clamping shoulder, a cap for the ring meinber having a valve clamping shoulder complementary to that of the sleeve .and provided with a fluid connection to the space between the sleeve and the core, ksaid ring member having a manifold communicating with the space between the ring member and the sleeve and having a fluid connection to said manifold, a rstvalve member clamped between the shoulders of the casing member and the ring and extending thence inwardly upon the edges of said webs and axially to the seat of thevsleeve, `a second valve member clamped between the shoulders of the sleeve and the cap and extending inwardly and supported on the edges of the webs between the sleeve and the core and extending thence axially to the seat portion of the core, and bolts holding the cap, the ring member and the casing member together, the respective valve members extending oppositely from their clamped portions to their respective free edges and each having an outer surface exposed to back pressure and each being supported inwardly by the edges of the partition webs respectively.

4. As a new article of manufacture, an annulus comprising an outer ring, an inner core, an

' intermediate sleeve and partition webs spacing the sleeve from the ring and the core, the sleeve and the core having axially elongated valve seats axially offset in opposite directions from opposite ends of said webs and toward which marginal surfaces of the respective Webs lead in opposite directions.

5. The sub-combination recited in claim 4 in which said annulus comprises integral means closing the space between the ring and the sleeve and providing a manifold, said ring having a lateral connection communicating with said manifold.

6. The sub-combination recited in claim 4 in which said annulus comprises integral means closing the space between the ring and the sleeve and providing a manifold, said ring having a lateral connection communicating with said manifold, said manifold being of progressively decreasing cross section away from the aforesaid connection, and the partition webs between the ring and the sleeve terminating short of said manifold and providing intermediate port spaces opening from the manifold.

7. The sub-combination recited in claim 4 in which the several partition webs are frustoconically formed on the edges leading to respective seats and have their respective opposite edges streamlined and tapered in thickness.V

8. In a valve, the combination of a casing member provided with a terminal shoulder, of a ring member having a complementary shoulder and a closure portion, a sleeve extending axially from the closure portion of the ring member to a point within the casing mem-ber and there provided with a valve seat, partition Webs connecting intermediate portions of the sleeve with the ring member adjacent its shoulder, said sleeve being spaced Within the ring member and casing member to provide an annular port subdivided by said partition means curving concavely toward the seat portion of said sleeve,

d l andan annular valve having a relatively heavy anchorage portion clamped between the shoulders of the casing member and the ring member respectively, said valve extending inwardly from the casing member and curvilinearly to project axially into the casing member to engagement with said seat while supported on said partition webs, a core spaced within said sleeve and provided with a seat within the ring member, a second set of partition webs connecting the core with said sleeve, the space between the sleeve and core constituting a second port subdivided by the second set of partiti-on webs, the partition webs of the second set having marginsextending toward the seat of said core, a closure Vfor the ring member having a tubular portion telesooped within the closure of the ringV member, said tubular portion and said sleeve having complementary clamping shoulders, a second valve havimg a relatively heavy anchorage portion clamped between the shoulders of the sleeve and the tubular portions aforesaid, said second valve having an annular valve part extending from its anchorage portion on the edges of the second set of partition Webs axially to a free edge engaged with the seat of said core, the space within the ring member between it and the sleeve constituting a manifold leading to the rst port and said ring member having a pipe connection'thereto, the space within the tubular portion of the cap and between it and the core constituting a chamber and the cap member hav-k ing a pipe connection thereto.

9. In a device of the character described, the.

combination with an outer ring and inner core and an intermediate sleeve, the outer ring having an inlet connection and the intermediate sleeve having an outlet connection, of flexible annular valve elements having fixed connections connected respectively with the ring and sleeve and yieldable ends and respectively engaged with the sleeve and core, said elements extending from the inlet connection and toward the outlet connection respectively and axially in opposite directions from their respective points of connection, the sleeve and core being respectively provided with seats engaged by the respective elements, means providing communication between the inlet and outlet connections around the end of said sleeve subject to the control of said elements, the said elements constituting check valves arranged in series between the said inlet and outlet.

CHARLES F. WARREN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 644,428 Hubbe l Feb. 27, 1900 1,029,726 Sprado June 18, 1912 1,935,376 Prellwitz Nov. 14, 1933 2,033,354 Pennington Mar. 10, 1936 2,211,212 Langdon Aug. 13, 1940 2,270,737 Langdon Jan. 20, 1942 2,242,582 Jeneick May 20, 1941 2,395,906 Owens Mar. 5, 1946 

